From: Xinming Hu <huxm@xxxxxxxxxxx>
Add device tree binding documentation for MARVELL's sd8xxx
(sd8897 and sd8997) wlan chip.
Signed-off-by: Xinming Hu <huxm@xxxxxxxxxxx>
Signed-off-by: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
---
Listing changelist for both 1/2 and 2/2 patches
v3: Don't update adapter->dt_node if mwifiex_plt_dev is NULL
v4: a)Corrected the 'name' and 'compatible' property names.(Arnd Bergmann and Rob
Herring)
b)Patch description wraped in 72 columns(Rob Herring)
c)Moved DT binding file to bindings/net/wireless/(Rob Herring)
d)Renamed "mwifiex,chip-gpio" to "marvell,wakeup-gpios"(Rob Herring/
Arnd Bergmann)
e)Replaced #ifdef with __maybe_unused(Arnd Bergmann)
v5: a)Removed wildcards from compatible string(Arnd Bergmann)
b)Prepared single patch for all binding changes(Rob Herring)
c)Specified our node as a subnode of SDIO controller. With this approach, we
don't need to register new platform driver. (Rob herring)
v6: a)List out the specific property names for marvell,caldata* and size of the data(Rob Herring)
b)Use sdio function number for both the unit address and reg(Rob Herring)
v7: a)Use suggested specific marvell,caldata property name and generic node name(Rob Herring)
---
.../bindings/net/wireless/marvell-sd8xxx.txt | 63 ++++++++++++++++++++++
1 file changed, 63 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt
diff --git a/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt b/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt
new file mode 100644
index 0000000..c421aba
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/wireless/marvell-sd8xxx.txt
@@ -0,0 +1,63 @@
+Marvell 8897/8997 (sd8897/sd8997) SDIO devices
+------
+
+This node provides properties for controlling the marvell sdio wireless device.
+The node is expected to be specified as a child node to the SDIO controller that
+connects the device to the system.
+
+Required properties:
+
+ - compatible : should be one of the following:
+ * "marvell,sd8897"
+ * "marvell,sd8997"
+
+Optional properties:
+
+ - marvell,caldata* : A series of properties with marvell,caldata prefix,
+ represent calibration data downloaded to the device during
+ initialization. This is an array of unsigned 8-bit values.
+ the properties should follow below property name and
+ corresponding array length:
+ "marvell,caldata-txpwrlimit-2g" (length = 566).
+ "marvell,caldata-txpwrlimit-5g-sub0" (length = 502).
+ "marvell,caldata-txpwrlimit-5g-sub1" (length = 688).
+ "marvell,caldata-txpwrlimit-5g-sub2" (length = 750).
+ "marvell,caldata-txpwrlimit-5g-sub3" (length = 502).
+ - marvell,wakeup-pin : a wakeup pin number of wifi chip which will be configured
+ to firmware. Firmware will wakeup the host using this pin
+ during suspend/resume.
+ - interrupt-parent: phandle of the parent interrupt controller
+ - interrupts : interrupt pin number to the cpu. driver will request an irq based on
+ this interrupt number. during system suspend, the irq will be enabled
+ so that the wifi chip can wakeup host platform under certain condition.
+ during system resume, the irq will be disabled to make sure
+ unnecessary interrupt is not received.
+
+Example:
+
+Tx power limit calibration data is configured in below example.
+The calibration data is an array of unsigned values, the length
+can vary between hw versions.
+IRQ pin 38 is used as system wakeup source interrupt. wakeup pin 3 is configured
+so that firmware can wakeup host using this device side pin.
+
+&mmc3 {
+ status = "okay";
+ vmmc-supply = <&wlan_en_reg>;
+ bus-width = <4>;
+ cap-power-off-card;
+ keep-power-in-suspend;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+ mwifiex: wifi@1 {
+ compatible = "marvell,sd8897";
+ reg = <1>;
+ interrupt-parent = <&pio>;
+ interrupts = <38 IRQ_TYPE_LEVEL_LOW>;
+
+ marvell,caldata_00_txpwrlimit_2g_cfg_set = /bits/ 8 <
+ 0x01 0x00 0x06 0x00 0x08 0x02 0x89 0x01>;
+ marvell,wakeup-pin = <3>;
+ };
+};
--
1.8.1.4
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